DE102016225850B3 - Radial lens assembly with optical zoom device and optical sensor having such a radial lens assembly - Google Patents

Abstract

The present invention relates to a radial lens assembly (100) for generating an optical image of a detection area. The radial lens assembly (100) includes a central light redirecting unit (120) that is configured and arranged to break and directionally transmit light (10) from the sensing area. The radial lens assembly (100) further comprises a light collection unit (160) configured and arranged to receive light (12) propagated from the central light redirecting unit (120) and to generate the optical image on an observation surface (110) of the light collection unit (160). to project. The central light redirecting unit (120) comprises a number of optical rings (122, 124, 126) fixedly disposed in the radial lens assembly (100, 200), wherein a respective one of the plurality of optical rings (122, 124, 126) is an outer one Mantle surface comprises (122-1; 124-1; 126-1) which faces in the radial direction, and wherein the central light deflection unit (120) is arranged such that the light (10) coming out of the detection area is deposited on the respective outer mantle surface (12). 122-1; 124-1; 126-1). According to the present invention, the central light redirecting unit (120) further comprises an optical zooming device (127) for zooming in and out of an observation portion of the detection range, the observation portion being magnified by zooming in on the observation surface (110), and wherein the observation section is reduced in size by the zooming out on the observation surface (110).

Description

The present invention relates to a radial objective arrangement for generating an optical image of a detection area, in particular a radial objective arrangement for an all-round optical sensor. Furthermore, the present invention relates to an optical sensor having such a radial lens assembly.

Such a radial lens assembly, as for example from the DE 10 2013 208 722 A1 is known, comprises a central Lichtumlenkeinheit and a light collection unit. In this case, the central Lichtumlenkeinheit is formed and arranged to break out of the detection area coming light and forward directionally directed. The detection area is, for example, an area lying above to / and / or below the radial objective arrangement. If, for example, a center of the radial objective arrangement is viewed as the center of a spherical coordinate system, the detection area comprises coordinates which have an arbitrary azimuth angle between -180 ° to + 180 ° and a polar angle between approximately 0 ° to 90 ° and / or 90 ° to 180 °. The detection area starts at the outer lateral surfaces of the central light deflection unit. The detection range extends below to / and / or above the central Lichtumlenkeinheit. The central light redirecting unit comprises a number of optical rings (ie, at least one optical ring) fixedly disposed in the radial lens assembly, the incident light being incident on the outer circumferential surface of a respective one of the plurality of optical rings. The number of optical rings of the light collection unit functions as a lens of the radial lens assembly. The optical rings are arranged such that the light coming from the detection area is incident on the respective outer jacket surface.

The light collection unit is configured and arranged to receive light transmitted by the central light deflection unit and to project it onto an observation surface of the light collection unit for generating the optical image. The light-collecting unit is designed, for example, as an optical cone, wherein a base of the cone forms the observation surface. From the observation surface, the light is preferably fed to an evaluation unit, which is designed, for example, to measure a brightness and / or to detect a change in brightness. The cone base of the cone is, for example, circular. Depending on the field of application, however, other shapes for the conical base come into consideration. For example, a substantially elliptical cone base is useful for detecting a playing field of a sports stadium.

Such a radial objective arrangement is particularly suitable for use in the technical fields of motion detection, motion detection, image recognition and light intensity determination, as well as in the field of data communication. In particular, the radial objective arrangement according to the invention is suitable for generating an image of a 360 ° all-round view of the detection area. Furthermore, the radial objective arrangement according to the invention is particularly suitable for being used as part of a motion-free sensor for communication signals and / or surrounding images. The radial lens assembly is good for both daytime use and night use.

The DE 600 37 040 T2 describes various stereo camera arrangements for recording panoramic images. In this case, each camera arrangement comprises a curved optical element, such as a mirror or a lens, to provide a relatively wide field of view.

In known from the prior art radial lens assembly of the type described above is disadvantageous that they do not offer the opportunity to selectively zoom a certain section of the detection area on the observation surface. If, for example, the image projected on the observation surface is fed to an evaluation unit and further processed digitally by it, a digital zoom function can in principle be implemented. However, a mere digital zoom is generally associated with a loss of resolution and thus a loss of image quality.

It is therefore an object underlying the invention to provide a radial objective arrangement for generating an optical image of a detection area, which enables a targeted enlargement and / or reduction of the image of a section of the detection area in a high resolution.

This technical problem is solved by a radial objective arrangement according to claim 1.

Accordingly, the central light-deflecting unit includes an optical zooming device for zooming in and out of an observation section of the detection section and / or zooming out of an observation section of the detection section, the observation section being enlarged by zooming in on the observation surface, and the observation section being reduced by zooming out on the observation surface is shown. An optical zoom device according to the invention allows an optical zoom through a targeted Change a focal length of the radial lens assembly, such that a real image that is projected onto the observation surface, enlarged or reduced is displayed. In this case, sections of the detection area, which are not the observation section, can be hidden, ie not imaged on the observation area. As a result of the optical zoom device according to the invention, a comparatively high resolution can also be achieved for the image of the correspondingly enlarged or reduced observation section compared with alternative solutions which are based, for example, on a digital zoom method.

Hereinafter, embodiments of the radial lens assembly according to the invention will be described. The additional features of these further embodiments may be combined with one another to form further embodiments, unless expressly described as alternative to one another.

In a preferred embodiment, the optical zoom device comprises at least one optical lens element. The optical lens element is preferably designed to break the light coming from the detection area in such a way that a variable focal length of the radial objective arrangement is realized.

According to a first variant, when zooming in and / or out, the zoom optical device is at least partially disposed in a beam path of the light from the detection area to the light collection unit so that the light coming out of the detection area passes through at least a part of the optical zoom device before entering the optical zoom device Light collecting unit enters.

In particular, when zooming in and / or zooming out, an optical lens element of the zoom optical device may be at least partially disposed in a beam path of the light from the detection area to the light collection unit.

According to a further advantageous variant, when zooming in and / or zooming out, the optical zoom device is arranged at least partially in a beam path of the light coming out of the detection area between the outer jacket surface and the light collecting unit. In particular, an optical lens element of the optical zoom device may be at least partially disposed in the beam path between the outer clad surface and the light collection unit. Here, an arrangement "between" the outer peripheral surface and the light-collecting unit does not mean that at least a part of the optical zoom device (e.g., a lens element) is disposed directly between the outer peripheral surface and the light-collecting unit. Rather, in addition, further structural elements of the radial objective arrangement or interspaces on the one hand can be located between the relevant part of the optical zooming device and the outer jacket surface and / or on the other hand between the relevant part of the optical zooming device and the light collecting unit.

In this case, at least one recess can preferably be formed on at least one of the optical rings, wherein the optical zoom device is arranged at least partially in the recess when zooming in and / or zooming out.

It is also within the scope of the invention that at least one of the optical rings is at least partially broken in the radial direction and forms a first space, wherein the optical zoom device is at least partially zoomed out when Zooming out in the first space.

The first space is preferably filled with a gas, such as air. But there are also depending on the desired degree of refraction and / or light attenuation other gases into consideration. The invention is by no means limited to the use of air as gas for the first space.

Advantageously, the recess and / or the first intermediate space has a shape which describes at least a portion of a ring which is concentric with the at least one optical ring. In particular, the recess and / or the first intermediate space may have the shape of a circumferentially circumferential ring which describes a bend angle of 360 ° or a ring cutout which describes an arc angle of less than 360 °.

Preferably, a position of at least one optical lens element within the radial lens assembly along a circumferential direction of the optical rings is adjustable. For example, when a center of the radial lens assembly is regarded as the center of a spherical coordinate system, the optical lens element along the circumferential direction of the optical rings may be adjustable so that only light from a certain azimuth angle range of the detection area is detected and refracted by the optical lens element. In this way, for example, the selection of the observation section with respect to an azimuth angle range is made possible.

In particular, the position of the at least one optical lens element within a recess and / or a first gap of at least one of the number of optical rings along the circumferential direction of the optical rings may be displaceable. For this purpose, the at least one optical lens element can be guided, for example, at least partially within a ring-shaped or ring-shaped recess or within a ring-shaped or ring-shaped first intermediate space.

Furthermore, a position of the at least one optical lens element within the radial objective arrangement is advantageously adjustable along a radial direction of the optical rings-alternatively or in addition to the already described adjustability in the circumferential direction. As a result, for example, for zooming in and / or zooming out of the observation section, a substantially radially extending section of the beam path can be influenced such that a focal length of the radial objective arrangement is changed.

Alternatively or additionally, a position of the at least one optical lens element within the radial lens assembly along a vertical direction, which is perpendicular to a radial direction and a circumferential direction of the rings, be adjustable. In this way, for example, for zooming in and / or zooming out of the observation section, a substantially vertically extending section of the beam path can be influenced in such a way that a focal length of the radial objective arrangement is changed. It is also conceivable that the at least one optical lens element for zooming in or zooming out of the observation section along the vertical direction is moved into a recess or a space of the type described above or moved out of such a recess or such a gap.

Preferably, the radial lens assembly comprises at least one actuator for power-operated adjustment of a position of the at least one optical lens element along a circumferential and / or radial and / or vertical direction. For example, the actuator may comprise at least one electric motor. For example, the actuator may comprise a precise stepper motor for fine adjustment of the optical lens element. In another embodiment, the actuator may be designed for manual operation.

It is also within the scope of the invention that the optical rings and the light collecting unit may be formed in a monolithic piece of material of the radial lens assembly. Due to the common formation of the optical rings and the light collection unit in the monolithic piece of material, the optical rings and the light collection unit are exactly aligned. In particular, it can be ensured in a simple manner that the optical rings and the light-collecting unit have a common optical axis which runs along a z-axis of the radial objective arrangement and comprises a respective center of the number of optical rings.

A respective one of the plurality of optical rings preferably comprises an inner circumferential surface facing in a direction opposite to the radial direction. The central light deflection unit is preferably designed to decouple the light coming from the detection area via the respective inner jacket surface and to forward it to the light collecting unit.

The central light deflection unit is preferably designed to break the light coming from the detection area in such a way that a light transport in the beam path, that is to say when the observation surface passes through, has a parallel course. Furthermore, the central light deflection unit is preferably designed such that light outside the parallel profile is scattered and / or attenuated on an upper and / or a lower jacket surface of the central light collecting unit. This scattered and / or dim light loses itself in the noise. With this approach, the refraction of light and the light transport are bound to simple calculation algorithms.

The number of optical rings are preferably designed to provide a light transport in a parallel beam path and / or in a focused light transport with total reflection.

In one embodiment, the optical rings each have a shape of a hollow cylinder, wherein the outer radius of the hollow cylinder is a multiple of the height. Preferably, the inner radius of the hollow cylinder is a multiple of the height.

For example, the outer radius is about 10 to 120 mm. The height of a respective optical ring is for example 1.5 to 7 mm. The height of the light collection unit, preferably designed as an optical cone, is for example identical to the total height of all optical rings. The distance of the light collecting unit to the central Lichtumlenkeinheit is variable.

In another embodiment, the light collection unit is the radial lens assembly as optical cone configured, wherein a base of the cone forms the observation surface on which the forwarded light is projected by the light collecting unit. The light collected by the light collecting unit thus preferably falls perpendicular to the observation surface. From there, it can be directed, for example, onto a photoresistive surface, which is preferably connected to an evaluation unit, such as a camera module.

The center angle of the optical cone is constant, for example, and is 45 degrees, for example. Depending on the field of application, at least part of the conical surface in one embodiment of the radial objective arrangement is, for example, concave and / or convex and / or lenticular.

In another preferred embodiment, the light collection unit and the central light redirecting unit of the radial lens assembly have a common optical axis that extends along a z-axis of the radial lens assembly and includes a respective center of the number of optical rings. The number of optical rings thus have a common central axis, which runs along the z-axis. The central axis of the light collecting unit also runs along this z-axis. For example, this z-axis extends in the perpendicular direction and in one embodiment, the number of optical rings of the central light deflection unit and the light collection unit are arranged vertically above one another.

The preferably designed as a hollow cylinder optical rings define an interior, whose central axis forms the common central axis. The light-collecting unit is preferably arranged such that its optical axis also falls on the common central axis, that is identical to this. The light-collecting unit may optionally be arranged in the interior or below or above the interior, wherein the optical axis of the light-collecting unit always falls on the optical axis of the central Lichtumlenkeinheit.

For detecting the light emerging from the detection area, in a preferred embodiment of the radial lens arrangement of at least one of the optical rings on an outer surface inclined relative to the z-axis outer surface, which in a radial direction, ie in a direction away from the z-axis direction has. A normal of the outer jacket surface is thus not perpendicular to the z-axis, but in an outer bevel angle of, for example, 70 ° or 110 °.

By selecting the bevel angle, it can be defined which detection range is to be picked up by the radial lens arrangement. In principle, it is necessary to focus on the observed surface areas. With such a determination, an observation height and a distance of the objects are fixed, i. the determination of the focal points for sharpening. If the central light deflection unit comprises not only one optical ring but several, then the bevel angles can be chosen to be different from one another, so that the incident light is always forwarded to the light collection unit. Several optical rings define different observation areas of the detection area. The light collecting unit then projects the relayed light onto the observation surface.

If the light collecting unit is designed as a cone, then this is preferably arranged such that a center of the base of the cone and a cone tip are also on the z-axis, ie on the common optical axis of the light collecting unit and the central Lichtumlenkeinheit. The central Lichtumlenkeinheit with the number of optical rings is arranged such that the forwarded light incident on the conical surface and is then projected from the cone on the base, ie on the observation surface, preferably such that the projected light perpendicular through the base / Observation area falls.

For this purpose, the bevelled outer lateral surface preferably has a concave peripheral profile.

In a further preferred embodiment of the radial objective arrangement, at least one of the optical rings of the central light deflection unit for transmitting the light comprises an inner jacket surface bevelled relative to the z axis and point to the z axis. A corresponding inner taper angle is preferably selected such that the central light deflection unit transmits the incident light to the conical surface of the light collection unit so that it can project the relayed light onto the observation surface.

In a further embodiment of the radial objective arrangement, at least one of the optical rings has a substantially trapezoidal cross-sectional area. Here, the inner taper angle and the outer taper angle are preferably selected such that the relayed light is relayed to the conical surface of the light collecting unit, so that the light collecting unit can project the relayed light onto the observation surface.

In a further preferred embodiment of the radial objective arrangement, the observation surface of the light collecting unit has a convex circumferential course. In this way, a focus is exactly defined.

In a particularly preferred embodiment of the radial objective arrangement, the number of optical rings is arranged in a layered relationship to one another. Preferably, the optical rings are each parallel to each other.

At least one of the number of optical rings preferably has a monolithic structure and preferably comprises a transparent optical material. The material of the optical rings can be freely selected depending on the application. For example, one of the number of optical rings is made of an optical glass, quartz glass and / or an acrylic.

A second intermediate space located between the central deflecting unit and the light collecting unit is preferably filled with a gas, such as air. But there are also depending on the desired degree of refraction and / or light attenuation other gases into consideration. The invention is by no means limited to the use of air as gas for the second space.

According to the invention, an optical sensor is also proposed for monitoring a detection area, which has a radial objective arrangement according to the present invention.

Further features and advantages of the present invention will become apparent in the following description of exemplary embodiments with reference to the figures.

Show it:

1A schematically and exemplarily a plan view of a first embodiment of a radial lens assembly according to the present invention;

1B schematically and exemplarily a side view of the first embodiment;

2A schematically and exemplarily a plan view of a second embodiment of a radial lens assembly according to the present invention;

2 B schematically and exemplarily a side view of the second embodiment; and

2C schematically and exemplarily a side view of a modification of the second embodiment.

1A shows schematically and exemplarily a plan view of a first embodiment 100 a radial lens assembly according to the present invention. 1B shows schematically and exemplarily thereto a side view of this first embodiment 100 , The six dashed vertical lines represent horizontal dimensions in the radial lens assembly 100 represents.

The radial lens assembly 100 includes a central light deflection unit 120 and a centrally arranged light collecting unit 160 ,

A spherical coordinate system, referred to hereinafter, includes the one fictitious z-axis 102 and a fictitious x-axis lying perpendicular thereto 104 , which could also be called the y-axis.

The radial lens assembly 100 is used to generate an optical image of a detection area, which in the illustrated embodiment, below the Radialobjektivanordnung 100 located. In terms of spherical coordinates, the detection range of the radial objective arrangement comprises 100 Coordinates with an azimuth angle between -180 ° and 180 °, a polar angle between 90 ° and 180 °, for example between 100 ° and 175 °, and a radius that is greater than the largest outer radius of the central Lichtumlenkeinheit 160 ,

The radial lens assembly 100 For example, it is arranged in a lantern and monitors a detection area located below the lantern lamp, so that the lantern can be switched on or off depending on a presence of an object in this detection area. Another area of application is animal observation. The radial lens assembly 100 For example, it forms part of the optics of a camera for animal observation. Thus, a detection area located below the observation position of the camera can be used depending on the presence of an animal for presence detection and / or image generation. The radial lens assembly 100 is arranged, for example, at a height of 2 m above ground.

The central light deflection unit receives light coming from the detection area 10 Break this and direct it directed to the light collection unit 160 , The light collection unit 160 receives the relayed light 12 and project this onto a viewing area 110 the light collecting unit 160 , From there, the light of a camera or a photocell can be supplied for the purpose of evaluation.

The central light deflection unit 120 includes a first optical ring 122 , a second optical ring 124 and a third optical ring 126 , The optical rings 122 . 124 and 126 are stationary in the radial lens arrangement 100 arranged. As material for the optical rings 122 . 124 and 136 as well as for the cone 160 For example, an acrylic is considered.

The light collection unit 160 is designed as a cone whose base is the observation surface 110 forms. The central light deflection unit 120 directs the incoming light 10 on a cone surface 160-1 the light collecting unit 160 so that these light on the observation area 110 can project.

The central light deflection unit 120 and the light collection unit have a common optical axis which is along a z-axis 102 the radial lens assembly 100 and a respective center of the number of optical rings 122 . 124 and 126 includes. For example, the z-axis runs 102 in the vertical direction, so that the light-collecting unit 160 and the optical rings 122 . 124 and 126 are arranged vertically one above the other.

The light collection unit 160 is arranged such that the observation surface 110 perpendicular to the z-axis 102 lies and that a cone point 160-2 also on the z-axis 102 lies.

For detecting the light coming out of the detection area 10 includes each of the optical rings 122 . 124 and 126 a relative to the z-axis 102 beveled outer shell surface 122-1 . 124-1 respectively. 126-1 , These outer shell surfaces 122-1 . 124-1 and 126-1 each point in the radial direction. A corresponding outer bevel angle is chosen such that a beam path as shown in FIG 1B is shown schematically, is realized. For example, the beveling of a respective outer mantle surface takes place according to a parabolic equation which defines a convex or concave profile. However, the outer bevel angle can be varied depending on the detection range. Likewise, this can be the beveled outer shell surfaces 122-1 . 124-1 and 126-1 have a respective concave circumferential course.

For forwarding the light, the optical rings comprise 122 . 124 and 126 a relative to the z-axis 102 beveled inner mantle surface 122-2 . 124-2 respectively. 126-2 , which to the z-axis 102 point, that is opposite to the radial direction. Also, a corresponding inner bevel angle is selected such that an in 1B schematically illustrated beam path can be realized. The choice of the outer bevel angle and the choice of the inner bevel angle ensures that the central light deflection unit 120 the light coming out of the detection area 10 on the cone surface 160-1 the light collecting unit 160 forward, so that this the forwarded light 12 on the observation area 110 can project. The projected light rays cross the observation area 110 in a direction that is substantially perpendicular to the observation surface 110 is located, ie approximately parallel to the z-axis 102 ,

As a result, the optical rings 122 . 124 and 126 each have a substantially trapezoidal cross-sectional area. The optical rings 122 . 124 and 126 are layered on each other and arranged substantially parallel to each other. For example, they each have a monolithic structure and are formed from a transparent optical material.

One between the central diverter unit 120 and the light collecting unit 160 located second gap 150 is filled with gas, such as air.

To define a focal point, the light collection unit 160 a convex circumferential course.

The light coming out of the detection area 10 is from the central diverter unit 120 , So over the tapered outer shell surfaces 122 . 124 and 126 , received and over the tapered inner shell surfaces 122-2 . 124-2 and 126-2 disconnects and to the light collection unit 160 forwarded.

In the second space 150 is as part of an optical zoom device 127 an optical lens element 127-1 intended. The optical lens element 127-1 is thus in a ray path of the light coming out of the detection area from the detection area to the light collecting unit 160 arranged.

The optical lens element 127-1 allows an optical zoom by a targeted change in a focal length of the radial lens assembly 100 , so that a real picture, which is on the viewing area 110 is projected, enlarged or reduced is mapped. In this case, the optical lens element 127-1 formed and arranged to break the light coming out of the detection range such that a variable focal length of the radial lens assembly 100 is realized.

The position of the optical lens element 127-1 within the radial lens assembly 100 is along a vertical direction Z (parallel to the z-axis 102 ), which is perpendicular to a radial direction and on a circumferential direction of the rings, adjustable. In this way, for zooming in and / or zooming out of the observation section, a substantially vertically extending section of the beam path of the light from the detection area can be influenced such that the focal length for the projection onto the observation area 110 is changed.

For power-operated adjustment of the vertical position of the lens element 127-1 may be provided an actuator (not shown), which may for example comprise an electric motor, such as a precise stepping motor. In another variant, the actuator may be designed for manual operation.

Furthermore, the optical lens element 127-1 for example, for zooming in or out of the observation section along a horizontal (ie, vertical direction to the vertical direction) direction in the beam path in the second space 150 in or out of the beam path in the second space 150 be moved out. For this purpose, a corresponding power-operated or manual actuator can be provided (not shown).

2A shows schematically and exemplarily a plan view of a second embodiment 200 a radial lens assembly according to the present invention. 2 B shows schematically and exemplarily a side view of this second embodiment 200 , 2C illustrates a modification of the second embodiment 200 in which no second space 150 between the optical rings 122 . 124 and 126 on the one hand and the light collecting unit 160 provided on the other hand.

The radial lens assembly 200 is essentially constructed of the same components as the radial lens assembly 100 , wherein in the radial lens assembly 200 the light collecting unit 160 is arranged in the opposite direction in the form of a cone.

Further, the light collecting unit 160 not above or below the central light deflection unit 120 arranged but in a second space 150 passing through the three optical rings 122 . 124 and 126 is formed, in such a way that the cone tip 160-2 in a through a first end face of the first optical ring 122 defined level opens and the base of the cone 160 , so the

viewing area 110 in a through a second end face of the third optical ring 126 formed level. Furthermore, in the embodiment according to 2 B the inner shell surfaces 122-2 . 124-2 and 126-2 not bevelled, but are substantially parallel to the z-axis 102 ,

The optical rings 122 . 124 . 126 are broken in the radial direction, thus forming a first space 151 out. The first gap 151 itself has a circumferentially encircling, annular shape, which to the optical rings 122 . 124 . 126 is concentric. This describes the first space 151 a closed ring around the z-axis 102 around, ie it includes with respect to the z-axis 102 an arc angle of 360 °. In other embodiments, it is of course also conceivable that the first gap 151 merely describes a ring cutout with an arc angle of less than 360 °. The first gap 151 may be filled with a gas, such as air. But there are also depending on the desired degree of refraction and / or light attenuation other gases into consideration.

At the in 2A and 2 B Illustrated embodiments is an optical zoom device 127 with a holding section 127-2 and two on the holder portion 127-2 arranged optical lens elements 127-1 intended. Here are the optical lens elements 127-1 - as in the 2A and 2 B at least when zooming in and / or zooming out at least partially in the first space 151 arranged. In other words, the first space represents 151 an optical groove for receiving the optical lens elements 127-1 the optical zoom device 127 represents.

It is also conceivable that the radial lens arrangement 200 only a lens element 127-1 , wherein the lens element 127-1 for example, annular or in the form of a (a certain arc angle descriptive) ring section may be formed. Even in such a case, a cross-sectional view as in the 2A and 2 B shown represent. In the following, it is assumed only by way of example that two separate lens elements 127-1 at the holding section 127-2 are arranged. In other embodiments, more than two, namely, for example, three, four or even more than four separate optical lens elements 127-1 as part of the optical zoom device 127 be provided.

The optical lens elements 127-1 can be used to zoom in or out along the vertical direction Z (the z-axis 102 ) are moved in or out of the gap. For this purpose, for example, an actuator may be provided (not shown), which on the holding portion 127-2 attacks to this one together with the fixedly arranged thereon lens elements 127-1 move vertically.

By the spatially variable arrangement of the optical lens elements 127-1 in the first space 151 In particular, a substantially radially extending portion of the beam path of the light from the detection range can be influenced such that one for a projection on the observation surface 110 relevant focal length of the radial lens assembly 200 is changed. In this way, it is possible to specifically increase and / or reduce the projection of the observation area on the observation area 110 be effected.

To adjust the focal length is also the position of the lens elements 127-1 within the radial lens assembly 200 along a radial direction of the optical rings 122 . 124 . 126 adjustable. For example, for this purpose, the holding section 127-2 by means of an actuator in a horizontal plane (which to a radial plane of the optical rings 122 . 124 . 126 parallel) is displaceable.

Further, the position of the optical lens elements 127-1 within the first space 151 along the circumferential direction of the optical rings 122 . 124 . 126 be displaceable. For this purpose, the at least one optical lens element 127-1 in the annular first space 151 be guided in a mobile way. For example, the holding section 127-2 by means of an actuator around the z-axis 102 rotatable about the position of the optical lens elements 127-1 along the circumferential direction of the annular first space 151 to adjust.

For example, becomes a center of the optical rings 122 . 124 . 126 the radial lens assembly 200 considered as the center of a spherical coordinate system, so can the optical lens elements 127-1 along the circumferential direction of the optical rings 122 . 124 . 126 be specifically adjusted so that only light from a certain azimuth angle range of the detection range of the optical lens elements 127-1 is captured and broken. In this way, the selective selection of an observation section based on an azimuth angle range is made possible. A size of the azimuth angle range may be, for example, the dimensions of the optical lens elements 127-1 be determined.

It may be advantageous in this context, a plurality of spaced-apart lens elements 127-1 at the holding section 127-2 to arrange. Thus, a required adjustment path (and possibly a required adjustment time associated therewith) can be reduced if a certain azimuth angle range of the detection area is used for the purpose of zooming in or out of a lens element 127-1 to be recorded; because if a plurality of spaced-apart lens elements 127-1 are provided, the required arc angle, by which the nearest lens must be adjusted on average, be lower than in the case in which only one lens element 127-1 is provided.

It should be noted that in an alternative embodiment (not shown) one or more optical lens elements 127-1 as part of an optical zoom device 127 radially outside the outer shell surface 122-1 . 124-1 . 126-1 may be arranged, such that the light from the detection area, the at least one optical lens element 127-1 happens before it gets into the outer mantle surface 122-1 . 124-1 . 126-1 entry. For example, for this purpose, a holding section 127-2 the optical zoom device 127 radially outward over the outer shell surface 122-1 . 124-1 . 126-1 extend beyond, wherein the at least one lens element 127-2 in an outer edge region of the holding portion 127-2 and thus radially outside the outer shell surfaces 122-1 . 124-1 . 126-1 is arranged.

In the modification according to 2C are the inner mantle surfaces 122-2 . 124-2 . 126-6 the central deflection unit 120 with the cone surface surface 160-1 been united; So, in each case have a corresponding bevel with respect to the z-axis 102 on.

The center angle of the cone in the embodiments according to 2A - 2C is for example 45 Degree. The height of the cone and thus the total height of the three optical rings 122 . 124 and 126 is for example 10 mm and the diameter of the approximately circular observation surface 110 is for example 25 mm. The optical rings 122 . 124 and 126 For example, have a diameter of about 215 mm.

The exemplary embodiments described are particularly suitable in each case for use in the technical fields of motion detection, motion detection, image recognition and light intensity determination as well as in the field of data communication. In particular, they are suitable for generating an image of a 360 ° all-round view of the detection area. Furthermore, they are suitable for use as part of a motion-free sensor for communication signals and / or environmental images; They are suitable for both daytime use and night use.

LIST OF REFERENCE NUMBERS

10

Incident light

12

Redirected light

100

First embodiment of the radial lens assembly

102

z-axis

104

X axis

110

viewing area

120

Central light deflection unit

122

First optical ring

122-1

Outer mantle surface of the first optical ring

122-2

Inner mantle surface of the second optical ring

124

Second optical ring

124-1

Outer mantle surface of the second optical ring

124-2

Inner mantle surface of the second optical ring

126

Third optical ring

126-1

Outer mantle surface of the third optical ring

126-2

Inner mantle surface of the third optical ring

127

Zoom device

127-1

Optical lens element

127-2

holding section

150

Second space

151

First gap

160

Light collection unit

160-1

Cone-shaped shell surface

160-2

apex

200

Second Embodiment of the Radial Lens Assembly

Z

Vertical direction

Claims (13)

Radial lens assembly ( 100 ; 200 ) for generating an optical image of a detection area, comprising - a central light deflection unit ( 120 ), which is designed and arranged, light coming from the detection area ( 10 ) to break and directionally forward; A light collecting unit ( 160 ), which is formed and arranged, from the central Lichtumlenkeinheit ( 120 ) transmitted light ( 12 ) and to generate the optical image on an observation surface ( 110 ) of the light collecting unit ( 160 ) to project; wherein the central light deflection unit ( 120 ) a number of optical rings ( 122 . 124 . 126 ) which are fixed in the radial objective arrangement ( 100 ; 200 ), wherein a respective one of the number of optical rings ( 122 . 124 . 126 ) an outer shell surface ( 122-1 ; 124-1 ; 126-1 ), which points in the radial direction, and wherein the central Lichtumlenkeinheit ( 120 ) is arranged such that the light coming from the detection area ( 10 ) on the respective outer mantle surface ( 122-1 ; 124-1 ; 126-1 ) is incident; characterized in that the central light deflection unit ( 120 ) an optical zoom device ( 127 ) for zooming in on an observation section of the detection area and / or for zooming out of an observation section of the detection area, the observation section being formed by zooming in on the observation area (FIG. 110 ) and wherein the observation section by zooming out on the observation surface ( 110 ) is displayed in reduced size. Radial lens assembly ( 100 ; 200 ) according to claim 1, characterized in that the optical zoom device ( 127 ) is arranged at zooming in and / or zooming out at least partially in such a beam path of the light from the detection area to the light collection unit, that the light coming from the detection area at least a part of the optical zoom device ( 127 ) before it enters the light collecting unit ( 160 ) entry. Radial lens assembly ( 100 ; 200 ) according to claim 1 or 2, characterized in that the optical zoom device ( 127 ) when zooming in and / or zooming out at least partially in a ray path of the light emerging from the detection area between the outer mantle surface ( 122-1 ; 124-1 ; 126-1 ) and the light collecting unit ( 160 ) is arranged. Radial lens assembly ( 100 ; 200 ) according to claim 3, characterized by at least one recess which on at least one of the optical rings ( 122 . 124 . 126 ), wherein the optical zoom device ( 127 ) is arranged at zooming in and / or when zooming out at least partially in the recess. Radial lens assembly ( 100 ; 200 ) according to claim 3 or 4, characterized in that at least one of the optical rings ( 122 . 124 . 126 ) is at least partially broken in the radial direction and a first space ( 151 ), wherein the optical zoom device ( 127 ) at least when zooming in and / or zooming out at least partially in the first space ( 151 ) is arranged. Radial lens assembly ( 100 ; 200 ) according to claim 4 or 5, characterized in that the recess and / or the first intermediate space ( 151 ) has a shape which describes at least a portion of a ring which is connected to the at least one optical ring ( 122 . 124 . 126 ) is concentric. Radial lens assembly ( 100 ; 200 ) according to one of the preceding claims, characterized in that the optical zoom device ( 127 ) at least one optical lens element ( 127-1 ). Radial lens assembly ( 100 ; 200 ) according to claim 7, characterized in that a position of the at least one optical lens element ( 127-1 ) within the radial lens assembly ( 100 ; 200 ) along a circumferential direction of the optical rings (FIG. 122 . 124 . 126 ) is adjustable. Radial lens assembly ( 100 ; 200 ) according to claim 7 or 8, characterized in that a position of the at least one optical lens element ( 127-1 ) within the radial lens assembly ( 100 ; 200 ) along a radial direction of the optical rings (FIG. 122 . 124 . 126 ) is adjustable. Radial lens assembly ( 100 ; 200 ) according to one of claims 7 to 9, characterized in that a position of the at least one optical lens element ( 127-1 ) within the radial lens assembly ( 100 ; 200 ) along a vertical direction (Z), which in a radial direction and on a circumferential direction of the rings (Z) 122 . 124 . 126 ) is vertical, is adjustable. Radial lens assembly ( 100 ; 200 ) according to one of claims 8 to 10, characterized by at least one actuator for power-operated adjustment of a position of the at least one lens element ( 127-1 ). Radial lens assembly ( 100 ; 200 ) according to one of the preceding claims, characterized in that the optical rings ( 122 . 124 . 126 ) and the light collecting unit ( 160 ) in a monolithic piece of material of the radial objective arrangement ( 100 ; 200 ) are formed. Optical sensor for monitoring a detection range, characterized in that the optical sensor has a radial objective arrangement ( 100 ; 200 ) according to one of the preceding claims.

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